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Terms in this set (54)
the energy of an object that is due to the object's motion
gravitational potential energy
Energy stored by objects due to their position above Earth's surface.
Roller Coaster when is potential energy the highest?
at the highest point before the drop
Roller Coaster when is the Kinetic Energy the highest?
when it is in motion
Law of Conservation of Energy
Energy cannot be created or destroyed
measures the horizontal distance between cycles
measures the height of the crest of the wave from the midline
is the way the volume of is determined is shown by the spacing of waves displayed
Can sound travel through liquids and solids?
Can sound travel in a Vaccum
Where does sound travel fastest?
Solids because all the molecules are packed together
Does sound move faster in warm or cool air?
Sound moves faster in warm air because the molecules are moving faster
What are the soundwaves name
Hertz and humans can hear from 20 to 20,000
What is the basic source of electromagnetic waves?
come from man made technology, a lot of of ultraviolet radiation is emitted by black lights and fluorescent lamps
How do electromagnetic waves move?
travel at the speed of light
Can transverse waves move through a vacuum?
What color of light has the higher frequency?
What is refraction?
is the bending of a wave when it enters a medium where its speed is different
What is one example of refraction?
What is a divergent plate boundary?
when plates move apart
What is a convergent plate boundary?
when plates move together
What is a transform plate boundary?
when plates slide past each other
Which constellation contains the big dipper?
Which constellation contains the little dipper?
Which constellation contains polaris?
Which constellation contains Betelgeuse?
Which constellation is called the hunter
Which star is the brightest star in the Northern Hemisphere?
Which one is known as the bright red star?
Which one is the north star?
Why does the big dipper change its position in the night sky over
the course of an evening but Polaris remains fixed in position?
because of the earths rotation
Stars are primarily made up of which two gases?
hydrogen and helium
Describe the process by which stars produce energy.
What color are hot stars?
Cool stars are what color?
The spectrum of light from a star has dark lines where the colors at
those wavelengths are missing. What can astronomers find out
about stars from these features?
the types of elements in the star
How are stars born?
stars begin as balls of dust and gas. gravity pulls the gas and dust together into a sphere. it gets denser and hotter. nuclear fusion changes hydrogen to helium.
What is a protostar?
forms when the gas and dust from a star forming collapses due to gravity
What are red giants?
they are stars that expand and become cooler when they are dying
What is a planetary nebulae?
the outer layers of the star that are blown off create this, it is an inner core surrounded by layers of gas.
What is a white dwarf star?
a small, very dense, hot star which has used up its fuel
What is a supernova?
massive stars bigger than the sun has an enormous explosion this occurs
What are neutron stars?
a small very dense core composed of neutrons
What are the three types of galaxies?
elliptical, spiral, irregular
What is the name of the galaxy we live in?
What kind (shape) of
galaxy is it?
Approximately how many stars does it contain?
100 billion stars
What is an exoplanet?
extrasolar planet is a planet outside the Solar System.
Has life been found outside our solar system?
How old is our universe?
the universe is 14 billion years old
Is our universe still expanding today?
What is the basic principle of Special Relativity?
the speed of light in a vacuum is the same, regardless of the motion of the source of the observer
Will two observers, one stationary and one moving, measure the
same time it takes for an event to occur?
The observer at rest will measure a longer time interval than the observer in motion
According to Einstein, what is the cause of gravity?
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